My render is black and all of the fixes I have seen do not work
It's not the donut - it's the material you are using. Whenever I choose other material the scene renders just fine, but with material nomber 3 and 6 everything goes black. 
It has to do something with the nodes you are using because when "Use nodes" is checked - it's black and when it's not checked it's normal.




My advice is not to use these materials - make a new one. You can even make the same nodes but don't capy and paste them - folow Andrew's tutorial.